A Piece of Wire $7 \pi y$ Inches Long Is Bent into a Circle

question 7

Multiple Choice

A piece of wire $7 \pi y$ inches long is bent into a circle. Express the area of the circle as a function of y.

• A) \(A ( x ) = 49 \pi y ^ { 2 }\)
• B) \(A ( x ) = \frac { 49 \pi y ^ { 2 } } { 2 }\)
• C) \(A ( x ) = 25 y ^ { 2 }\)
• D) \(A ( x ) = \frac { 25 \pi y ^ { 2 } } { 4 }\)
• E) \(A ( x ) = \frac { 49 \pi y ^ { 2 } } { 4 }\)

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